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Fencer Vulns
high 7.5

CVE-2022-21546 json

scsi: target: Fix WRITE_SAME No Data Buffer crash

published 2025-05-02 18 mo ago modified 2026-08-05 3 mo ago also EUVD-2022-26770

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

scsi: target: Fix WRITE_SAME No Data Buffer crash

In newer version of the SBC specs, we have a NDOB bit that indicates there is no data buffer that gets written out. If this bit is set using commands like "sg_write_same --ndob" we will crash in target_core_iblock/file's execute_write_same handlers when we go to access the se_cmd->t_data_sg because its NULL.

This patch adds a check for the NDOB bit in the common WRITE SAME code because we don't support it. And, it adds a check for zero SG elements in each handler in case the initiator tries to send a normal WRITE SAME with no data buffer.

Patch / fix

  • Linux Linux 5.4.294, 5.10.238, 5.15.182, 5.19
  • linux Debian 14, Debian 13, Debian 12 5.19.6-1

debian advisories DEBIAN-CVE-2022-21546

  • linux Ubuntu 22.04 LTS 5.15.0-144.157
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1088.95
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1087.96
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1085.91
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1080.83
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1084.89
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1094.103
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1070.78

ubuntu advisories UBUNTU-CVE-2022-21546

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-syms SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 4.12.14-122.266.1
  • kernel-source SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 4.12.14-122.266.1
  • kernel-default SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS, SLE Live Patching 12 SP5 4.12.14-122.266.1
  • kgraft-patch-SLE12-SP5_Update_70 SLE Live Patching 12 SP5 1-8.5.1

suse advisories SUSE-SU-2025:02334-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.